(19)

(11)

EP 1 623 322 A2

(12)

(88) Date of publication A3: 07.04.2005 (43) Date of publication: 08.02.2006 Bulletin 2006/06 (21) Application number: 04731051.1 (22) Date of filing: 04.05.2004

(51) International Patent Classification (IPC):  G06F 9/46(1980.01) (86) International application number: PCT/GB2004/001927 (87) International publication number: WO 2004/097632 (11.11.2004 Gazette 2004/46)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 01.05.2003 US 428758 (71) Applicant: International Business Machines Corporation Armonk, N.Y. 10504 (US)	(72) Inventor: WALKER, Michael, Leo San Jose, CA 95136 (US) (74) Representative: Roberts, Scott Anthony  IBM United Kingdom Limited Intellectual Property Law Hursley Park Winchester Hampshire SO21 2JN Winchester Hampshire SO21 2JN (GB)